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ALTUVIIIO® Patient Experiences 


“ALTUVIIIO has really exceeded our expectations.” 
 

Considering the switch 

It was getting harder to schedule infusions around Paxton’s sports and activities, and he was experiencing more breakthrough bleeding. I was nervous about making a change, but our goal was to protect his body and his joints from bleeds, and the potential for higher factor levels and fewer infusions with ALTUVIIIO was exciting. 
 

Working with Paxton’s doctors 

His doctor told us making the switch was the right move, and our hematologist knew Paxton’s physical activity was increasing, thinking of him the day ALTUVIIIO was approved. Paxton’s doctor created a full pharmacokinetic study so we could see the impact on his levels over the first 5 days. Then, she checked in on him every week for the first month. His nurse, care coordinator, and hematologist also took part in the follow-up to the switch. 
 

Expectations vs experience 

Making the switch to a brand-new treatment was a bit hectic from an insurance perspective, but the Sanofi Support team was there to help, and we officially switched in April of 2023. Since then, ALTUVIIIO has really exceeded my expectations. Paxton lives with factor levels over 40% several days each week, has not had any breakthrough bleeds, and his Day 7 trough level is 15%.
 

Things can be better 

Sometimes you get used to certain aspects of living with hemophilia, and a lot of patients have a “not broke, don’t fix” mentality—even if it takes 3 infusions per week to fight bleeding. But something doesn’t have to be broken to be improved, and “good enough” isn’t good enough if you're still having breakthrough bleeds. We should always be moving toward higher factor levels, fewer infusions, and a strong safety profile. Don’t let hemophilia steal your joy or your dreams. 


This testimonial reflects one patient’s experience and has not been clinically evaluated. It is not intended to imply typical outcomes or substitute for clinical evidence. Paxton and Jenny are promotional speakers compensated by Sanofi and received free product through Sanofi's Support Program. 

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Indication

ALTUVIIIO® [antihemophilic factor (recombinant), Fc-VWF-XTEN fusion protein-ehtl] is a von Willebrand Factor (VWF) independent recombinant DNA-derived, Factor VIII concentrate indicated for use in adults and children with Hemophilia A (congenital factor VIII deficiency) for:

  • Routine prophylaxis to reduce the frequency of bleeding episodes
  • On-demand treatment & control of bleeding episodes
  • Perioperative management of bleeding
Limitation of Use

ALTUVIIIO is not indicated for the treatment of von Willebrand disease.

Important Safety Information

Contraindications

ALTUVIIIO is contraindicated in patients who have had severe hypersensitivity reactions, including anaphylaxis, to the product or its excipients.

Warnings and Precautions
  • Allergic-type hypersensitivity reactions, including anaphylaxis, have occurred with ALTUVIIIO. Discontinue use of ALTUVIIIO if hypersensitivity reaction occurs and manage symptoms as appropriate.
  • Formation of neutralizing antibodies (inhibitors) to Factor VIII are possible following administration of ALTUVIIIO. Neutralizing antibodies were not reported in the clinical trials. Monitor all patients for the development of Factor VIII inhibitors by appropriate clinical observations and laboratory tests.
  • If assessment of plasma Factor VIII activity is needed, it is recommended to use a validated one-stage clotting assay. The ALTUVIIIO Factor VIII activity level is overestimated by the chromogenic assay and a specific ellagic acid-based aPTT reagent in one-stage clotting assay by approximately 2.5-fold. If these assays are used, divide the result by 2.5 to approximate the patient's ALTUVIIIO Factor VIII activity level.
Adverse Reactions

The most common adverse reactions (>10% of subjects) reported in clinical trials were headache and arthralgia.

Indication

Important Safety Information

© 2025 Sanofi. All rights reserved. ALTUVIIIO, MyALTUVIIIO, and Sanofi are registered trademarks of Sanofi or an affiliate. MAT-US-2508205-v1.0-11/2025 Last Updated: November 2025